Lubricator for air-cylinders of locomotive-air-brake pumps.



W. G. HEDGOOGK. LUBEICATOR FOR AIR CYLINDERS 0P LOGOMOTIVE AIR BRAKE PUMPS.

APPLICATION FILED APR. 14, 1911.

g g gyg Patented Jan. 7, 1913;

WITNESSES: m/ VEf/ r01? j J Mg? 1 /44 62x4 A HORNE) WiLLIAM CLIFTON HEDGCOCK, F LOUISVILLE, KENTUCKY.

LUBRICATOR FOR AIR-CYLINDERS OF LOCOMOTIVE-AIR-BRAKE PUMPS.

Specification of Letters Patent.

Patented Jan. 7, 1913.

Application filed April 14, 1911. Serial No. 621,017.

To all whom it may concern Be it known that 1, WILLIAM C. HanccocK, a citizen of the United States, residing in Louisville, in the county of Jefferson and State of Kentucky, have invented a new and useful Improvement in Lubricators for Air- Gy'linders of Locomotive-Air-Brake Pumps, of which the following is a specification.

My invention relates to sight-feed or other lubricators for lubricating the air cylinders of locomotive air brake pumps; and the objects of my invention, are, first, to provide a valve which will deliver but a certain desired quantity of oil with each revolution thereof, and, second, to provide a valve which requires constant manipulation by the operator to enable the lubricator to designated by the reference A and is feed, the feed being prevented when the valve is not being moved by the operator. thus preventing excess feed of the oil and consequent injury to the air brake equipment. I attain these objects by the arrangements illustrated in the accompanying drawing, in which- Figure 1 is a plan view of a lubricator valve embodying my improvements. Fig. 2 is a sectional view of the structure shown in Fig. l, and taken on the line 2-2 thereof, and Fig. 3 is a side elevation of the complete sight feed lubricator.

The main or body partof the lubricator is pro- I vidcd with a rotary plug valve C, the latter having a hole or measuring chamber D extending therethrough in which is mounted the gravity operated, freely slidable plunger E, the latter preferably having conical ends E adapted to coiiperate with similarly shaped seats-P in the opposite ends of the hole D. As shown in the drawing, the retary plug valve C has one of its valve seats P formed in a removable screw threaded plug'R, this plug It being provided so that the plunger E may be removably retained in the valve, and if desired, interchanged for other plugs of different size, whereby to vary the amounts of the oil being fed.

The oil is supplied from a feed tank (not shown) through an oil supply opening F which, as shown in the drawing, is in vertical alinement with the oil feed nozzle or opening B. The valve C is adapted to be rotatedasby means of a handle J secured on a stem I extending from the valve C, and the amount of rotation of the valve may be limited as by means of a pair of stops M and M formed respectively on the valve 5) mg] the main or body part of the lubricaor place, the same is provided with a screw threaded extension having a nut G mounted thereon, between which and the body of the lubricator A is placed a washer H. The lubricator is also preferably provided with a sight feed glass K, positioned below the feed nozzle B, so that the oil or other lubricant in dropping from the'nozzle B into For retainingthe plug valve C in the opening L in the bottom of the lubricator may be visible. For conveniently attaching the lubricator to the pipe leading to the air cylinder, the lower part of the body of the lubricator is provided with a screw threaded port-ion S and for connecting the I lnbricator to the feed pipe from the oil supply, another screw threaded portion S is provided at the upper end thereof.

In operation, the oil will feed through the oil supply opening F and a certain uantity will be caught and retained in the opening D in the rotary valve C and'will be prevented from discharging into the feed nozzle B on account of the plug E being seated on one of the seats P, the'plug E being operated upon both by the pressure of the oil from the tank and also by gravity.

As the valve C is being rotated 180 degrees,

the supply of oil through the opening F will be cut oil until the opening D is again in alinement with the inlet F and'outlet opening B, whereupon the plug E willdischarge the measured quantity of oil in the opening D, and after dischargingfthis measured quantity, will prevent the further discharge from the oil supply tank and the valve will again receive a quantity of oil which may be discharged upon another turning of the valve a half revolution. The plunger or plug E may be supplied of various lengths, as desired or required, to feed different measured quantities of lubricant at each turn of the valve. By simply substituting shorter or longer plungers, any desired quantity of lubricant may be discharged at each movement of the valve.

I claim i 1. In a lubricator, the combination with a body having a supply opening and a discharge opening, of a rotary valve having a passage therethrough, a sliding gravity actuated plunger fitting in said passage of the valve, said valve having seats at the opposite ends of said passage therein for en- ,body having a su gagement with said plunger to cause the plunger to alternately .close the opposite ends of said passage, substantially as specified.

2. In a lubricator, the combination with a ply opening and a discharge opening, 0 a rotary valve having a passage therethroilgh, a sliding gravity actuated plunger fitting in said passage of the valve, said valve having seats at the opposite ends of said passage. therein for engagement with said plunger to cause the plunger to alternately closethe opposite ends of said passage, said valve being provided with a separate piece plug in which one of said seats is formed, substantially as specified.

' 3; In a lubricator, the combination with a-body having a; supply opening and a discharge opening, of arotary valve having a passage theret-hrough, said passage havin contracted ends, a plunger fitting in said passage and adapted to"alternately close the contracted ends of said passage when brought adjacent to the discharge opening in said body, said plunger being adapted to slide in said passage under pressure of the lubricant from the supply orifice, substantially as specified.

WILLIAM CLIFTON nimccocx.

Witnesses: PEARL ABRAMS,

;H. M, MUNDAY. 

